Anyone know how one-way rental availability works, and if it is common to be told this is 'unavailable'?

Specifically, looking for a one-way rental, picking up at CVG and returning to CMH 3 days later. While the website shows me options from either of these locations returning to the same location, it gives me a message in red saying there are no cars available when I ask to return to a different location.

Is this a largely post-pandemic issue where they are restricting one-way rentals? I haven't tried to do this a ton in the past, but have searched for something like this before and never had an issue. I initially thought it might be an issue with a discount code, etc., but even taking all those off, it still says no availability. Haven't looked at other rental companies...yet, but I tend to favor Hertz because as a AAA member, get a free car seat which really helps with the AI rate since this trip will be with a 4yo, and a real PITA to travel with a seat.